JSP| DB : 회원가입 및 회원정보 수정 프로그래밍

  • M(model): DB- Servlet
  • V(view): JSP HTML
  • C(controller): view에 합쳐서

작성 순서

1. join.html(view,con) + DB


1. join.html 작성
2. 1을 기반으로 SQL문 작성하기

joinOk Servlet(Model-DB)

logIn.html(view,con)

LogInOk Servlet(Model-DB)

  • logIn.html에서 넘어온 값으로 회원인지 아닌지
  1. DB 접근
  2. Member 테이블 접근
  3. 받은 아이디가 존재하는 지 아닌지
  4. 비밀번호가 일치하는지 아닌지
package com.javalec.ex;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.Statement;
import java.util.Arrays;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet implementation class LogInOk
 */
@WebServlet("/LogInOk")
public class LogInOk extends HttpServlet {
	private static final long serialVersionUID = 1L;

	private Connection connection;
	private Statement stmt;
	private ResultSet resultSet;

	private String name, id, pw, phone1, phone2, phone3, gender;

	/**
	 * @see HttpServlet#HttpServlet()
	 */
	public LogInOk() {
		super();
		// TODO Auto-generated constructor stub
	}

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		actionDo(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse
	 *      response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		actionDo(request, response);
	}

	private void actionDo(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {

		id = request.getParameter("id");
		pw = request.getParameter("pw");
		
        //2. Member 테이블 접근
        //3. 받은 아이디가 존재하는 지 아닌지
		//4. 비밀번호가 일치하는지 아닌지
		String query = "select * from member where id = '" + id + "' and pw = '" + pw + "'";

		try {
        	//1. DB 접근
			Class.forName("oracle.jdbc.driver.OracleDriver");
			connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe", "scott", "tiger");
			stmt = connection.createStatement();
			resultSet = stmt.executeQuery(query);

			// resultSet객체로 반환한 쿼리 실행문 결과 데이터가 있다면: true
			while (resultSet.next()) {
				name = resultSet.getString("name");
				id = resultSet.getString("id");
				pw = resultSet.getString("pw");
				phone1 = resultSet.getString("phone1");
				phone2 = resultSet.getString("phone2");
				phone3 = resultSet.getString("phone3");
				gender = resultSet.getString("gender");
			}

			/*
			 * 브라우저 하나당 하나의 세션 존재 
			 * name 값에 name 입력 
			 * id, id 
			 * pw, pw
			 */

			HttpSession httpSession = request.getSession();
			httpSession.setAttribute("name", name);
			httpSession.setAttribute("id", id);
			httpSession.setAttribute("pw", pw);

			response.sendRedirect("loginResult.jsp");

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (resultSet != null)
					resultSet.close();
				if (stmt != null)
					stmt.close();
				if (connection != null)
					connection.close();
			} catch (Exception e2) {
				e2.printStackTrace();
			}
		}

	}

}

정보처리: SQL에서 돌리기
출력: 자바

modify.jsp(view,con)

<%@page import="java.sql.DriverManager"%>
<%@page import="java.sql.ResultSet"%>
<%@page import="java.sql.Statement"%>
<%@page import="java.sql.Connection"%>
<%@ page language="java" contentType="text/html; charset=EUC-KR"
    pageEncoding="EUC-KR"%>
    
    <%!
    	Connection connection;
    	Statement statement;
    	ResultSet resultSet;
    
    	String name, id, pw, phone1, phone2, phone3, gender;
    %>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=EUC-KR">
<title>Insert title here</title>
</head>
<body>
	
	<%
		// 로그인 후 session에 살아있는 아이디 값을 가져옴
		id = (String)session.getAttribute("id");
	
		// ID 정보로 멤버 테이블 접근
		String query = "select * from member where id = '" + id + "'";
		
		//DB 연결
		Class.forName("oracle.jdbc.driver.OracleDriver");
		connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe" , "scott" , "tiger");
		statement = connection.createStatement();
		resultSet =  statement.executeQuery(query);
		
		while(resultSet.next()) {
			name = resultSet.getString("name");
			pw = resultSet.getString("pw");
			phone1 = resultSet.getString("phone1");
			phone2 = resultSet.getString("phone2");
			phone3 = resultSet.getString("phone3");
			gender = resultSet.getString("gender");
		}
		
	%>
	
	<!-- 회원가입과 같이 정보 입력, ModifyOk로 정보 post -->
	<form action="ModifyOk" method="post">
		이름 : <input type="text" name="name" size="10" value=<%=name %>><br />
		아이디 : <%=id %><br />
		비밀번호 : <input type="text" name="pw" size="10"><br />
		전화번호 : <select name="phone1">
			<option value="010">010</option>
			<option value="016">016</option>
			<option value="017">017</option>
			<option value="018">018</option>
			<option value="019">019</option>
			<option value="011">011</option>
		</select> - 
		<input type="text" name="phone2" size="5" value=<%=phone2 %>> - <input type="text" name="phone3" size="5" value=<%=phone3 %>> <br />
		<%
			if(gender.equals("man")) {
		%>
		성별구분 : <input type="radio" name="gender" value="man" checked="checked">남 &nbsp;<input type="radio" name="gender" value="woman">여 <br />
		<%
			} else {
		%>
		성별구분 : <input type="radio" name="gender" value="man" >남 &nbsp;<input type="radio" name="gender" value="woman" checked="checked">여 <br />
		<%
			}
		%>
		<input type="submit" value="정보수정"> <input type="reset" value="취소">
	</form>

</body>
</html>

ModifyOk Servlet(Model-DB)

package com.javalec.ex;

import java.io.IOException;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;

import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * Servlet implementation class ModifyOk
 */
@WebServlet("/ModifyOk")
public class ModifyOk extends HttpServlet {
	private static final long serialVersionUID = 1L;
    
	private Connection connection;
	private Statement stmt;
	
	private String name, id, pw, phone1, phone2, phone3, gender;
	
	HttpSession httpSession;
    /**
     * @see HttpServlet#HttpServlet()
     */
    public ModifyOk() {
        super();
        // TODO Auto-generated constructor stub
    }

	/**
	 * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		actionDo(request, response);
	}

	/**
	 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
	 */
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		actionDo(request, response);
	}
	
	private void actionDo(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		request.setCharacterEncoding("EUC-KR");
		// session 가져오기
		httpSession = request.getSession();
		
		// 세션에 있던 값
		name = request.getParameter("name");
		id = request.getParameter("id");
		pw = request.getParameter("pw");
		phone1 = request.getParameter("phone1");
		phone2 = request.getParameter("phone2");
		phone3 = request.getParameter("phone3");
		gender = request.getParameter("gender");
		
		//세션의 비번값과 입력된 비번값이 일치
		if(pwConfirm()){
			System.out.println("OK");
			
			//DB에서 값 업데이트
			String query = "update member set name ='" + name + "', phone1= '" + phone1 + "', phone2 = '" + phone2 + "', phone3 = '" + phone3 + "', gender = '" + gender + "'";
//			System.out.println(query);
			
			try {
				Class.forName("oracle.jdbc.driver.OracleDriver");
				connection = DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:xe" , "scott" , "tiger");
				stmt = connection.createStatement();
				int i = stmt.executeUpdate(query);
				
				//쿼리 실행결과가 1 이면 true
				if(i ==1 ){
					System.out.println("update success");
					httpSession.setAttribute("name", name);
					response.sendRedirect("modifyResult.jsp");
					
					//실행된 쿼리가 없으면
				} else {
					System.out.println("update fail");
					response.sendRedirect("modify.jsp");
				}
				
			} catch(Exception e) {
				e.printStackTrace();
			} finally {
				try {
					if(stmt != null) stmt.close();
					if(connection != null) connection.close();
				} catch (Exception e) {}
			}
			
		} else {
			System.out.println("NG");
		}
		
	}
	
	private boolean pwConfirm() {
		boolean rs = false;
		
		//Obj인 세션값 형변환, session에서 pw가져오기
		String sessionPw =  (String)httpSession.getAttribute("pw");
		
		
		//session에서 가져온 pw가 일치하면 참 
		if(sessionPw.equals(pw)) {
			rs = true;
		} else {
			rs = false;
		}
		
		return rs;
	}

}
백준 16234번 인구 이동
boj1072 게임_java

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